<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        class phone {
            constructor(brand, price) {
                    this.brand = brand;
                    this.price = price;
                }
                //父类的成员属性
            call() {
                console.log('我可以打电话');
            }
        }
        class smartPhone extends phone {
            //构造方法
            constructor(brand, price, color, size) {
                super(brand, price); //相当与phone.call(this,brand,price);
                this.color = color;
                this.size = size;
            }
            photo() {
                console.log('拍照');
            }
            playGame() {
                console.log('玩游戏');
            }
        }
        let xiaomi = new smartPhone('小米', 2999, '白色', '5.5inch');
        console.log(xiaomi);
        xiaomi.call();
        xiaomi.photo();
        xiaomi.playGame();
    </script>
</body>

</html>